7819239641 has 8 divisors (see below), whose sum is σ = 8327054664. Its totient is φ = 7316742400.

The previous prime is 7819239611. The next prime is 7819239653. The reversal of 7819239641 is 1469329187.

It can be written as a sum of positive squares in 4 ways, for example, as 1499625625 + 6319614016 = 38725^2 + 79496^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7819239641 - 2¹⁴ = 7819223257 is a prime.

It is a super-2 number, since 2×7819239641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7819239641.

It is not an unprimeable number, because it can be changed into a prime (7819239611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1326410 + ... + 1332291.

It is an arithmetic number, because the mean of its divisors is an integer number (1040881833).

Almost surely, 2^7819239641 is an apocalyptic number.

It is an amenable number.

7819239641 is a deficient number, since it is larger than the sum of its proper divisors (507815023).

7819239641 is a wasteful number, since it uses less digits than its factorization.

7819239641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658891.

The product of its digits is 653184, while the sum is 50.

The square root of 7819239641 is about 88426.4645962961. The cubic root of 7819239641 is about 1984.8217383332.

The spelling of 7819239641 in words is "seven billion, eight hundred nineteen million, two hundred thirty-nine thousand, six hundred forty-one".